I know there are quite a few apps that don’t do this, so I don’t know how feasible it is, but I was wondering—would it be possible to configure column setups on a mailbox-by-mailbox basis? For instance, it’s a bit of a waste of space to have a ‘to’ in my Mail Archive folder, but it’s also a waste to have a ‘from’ in my Sent Archive folder.
I’ve used some apps that did this, and I always found it annoying because it seemed to make me spend more time adjusting the columns. Also, there’s the question of what should happen if you select two mailboxes at once that have different column settings. I’ll consider adding this feature if it looks like something people want, but my first reaction is that maybe there’s a better way to address the underlying issue.